/**
 * @file lv_port_disp_templ.c
 *
 */

/*Copy this file as "lv_port_disp.c" and set this value to "1" to enable content*/
#if 1

/*********************
 *      INCLUDES
 *********************/
#include "lv_port_disp.h"
#include <stdbool.h>

#define MY_DISP_HOR_RES	240
#define MY_DISP_VER_RES 280
/*********************
 *      DEFINES
 *********************/
#ifndef MY_DISP_HOR_RES
    #warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen width, default value 320 is used for now.
    #define MY_DISP_HOR_RES    320
#endif

#ifndef MY_DISP_VER_RES
    #warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen height, default value 240 is used for now.
    #define MY_DISP_VER_RES    240
#endif

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static void disp_init(void);

static void disp_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area,
		lv_color_t *color_p);
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
//        const lv_area_t * fill_area, lv_color_t color);

/**********************
 *  STATIC VARIABLES
 **********************/

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

void lv_port_disp_init(void) {
	/*-------------------------
	 * Initialize your display
	 * -----------------------*/
	disp_init();

	/*-----------------------------
	 * Create a buffer for drawing
	 *----------------------------*/

	/**
	 * LVGL requires a buffer where it internally draws the widgets.
	 * Later this buffer will passed to your display driver's `flush_cb` to copy its content to your display.
	 * The buffer has to be greater than 1 display row
	 *
	 * There are 3 buffering configurations:
	 * 1. Create ONE buffer:
	 *      LVGL will draw the display's content here and writes it to your display
	 *
	 * 2. Create TWO buffer:
	 *      LVGL will draw the display's content to a buffer and writes it your display.
	 *      You should use DMA to write the buffer's content to the display.
	 *      It will enable LVGL to draw the next part of the screen to the other buffer while
	 *      the data is being sent form the first buffer. It makes rendering and flushing parallel.
	 *
	 * 3. Double buffering
	 *      Set 2 screens sized buffers and set disp_drv.full_refresh = 1.
	 *      This way LVGL will always provide the whole rendered screen in `flush_cb`
	 *      and you only need to change the frame buffer's address.
	 */

	/* Example for 1) */
//    static lv_disp_draw_buf_t draw_buf_dsc_1;
//    static lv_color_t buf_1[MY_DISP_HOR_RES * 10];                          /*A buffer for 10 rows*/
//    lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, MY_DISP_HOR_RES * 10);   /*Initialize the display buffer*/
	/* Example for 2) */
#define LINES 5
	static lv_disp_draw_buf_t draw_buf_dsc_2;
	static lv_color_t buf_2_1[MY_DISP_HOR_RES * LINES]; /*A buffer for 10 rows*/
	static lv_color_t buf_2_2[MY_DISP_HOR_RES * LINES]; /*An other buffer for 10 rows*/
	lv_disp_draw_buf_init(&draw_buf_dsc_2, buf_2_1, buf_2_2,
			MY_DISP_HOR_RES * LINES); /*Initialize the display buffer*/

	/* Example for 3) also set disp_drv.full_refresh = 1 below*/
//    static lv_disp_draw_buf_t draw_buf_dsc_3;
//    static lv_color_t buf_3_1[MY_DISP_HOR_RES * MY_DISP_VER_RES];            /*A screen sized buffer*/
//    static lv_color_t buf_3_2[MY_DISP_HOR_RES * MY_DISP_VER_RES];            /*Another screen sized buffer*/
//    lv_disp_draw_buf_init(&draw_buf_dsc_3, buf_3_1, buf_3_2,
//                          MY_DISP_VER_RES * LV_VER_RES_MAX);   /*Initialize the display buffer*/
	/*-----------------------------------
	 * Register the display in LVGL
	 *----------------------------------*/

	static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
	lv_disp_drv_init(&disp_drv); /*Basic initialization*/

	/*Set up the functions to access to your display*/

	/*Set the resolution of the display*/
	disp_drv.hor_res = MY_DISP_HOR_RES;
	disp_drv.ver_res = MY_DISP_VER_RES;

	/*Used to copy the buffer's content to the display*/
	disp_drv.flush_cb = disp_flush;

	/*Set a display buffer*/
	disp_drv.draw_buf = &draw_buf_dsc_2;

	/*Required for Example 3)*/
	//disp_drv.full_refresh = 1;
	/* Fill a memory array with a color if you have GPU.
	 * Note that, in lv_conf.h you can enable GPUs that has built-in support in LVGL.
	 * But if you have a different GPU you can use with this callback.*/
	//disp_drv.gpu_fill_cb = gpu_fill;
	/*Finally register the driver*/
	lv_disp_drv_register(&disp_drv);
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

/*Initialize your display and the required peripherals.*/
static void disp_init(void) {
	/*You code here*/
}

volatile bool disp_flush_enabled = true;

/* Enable updating the screen (the flushing process) when disp_flush() is called by LVGL
 */
void disp_enable_update(void) {
	disp_flush_enabled = true;
}

/* Disable updating the screen (the flushing process) when disp_flush() is called by LVGL
 */
void disp_disable_update(void) {
	disp_flush_enabled = false;
}

/*Flush the content of the internal buffer the specific area on the display
 *You can use DMA or any hardware acceleration to do this operation in the background but
 *'lv_disp_flush_ready()' has to be called when finished.*/
static void disp_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area,
		lv_color_t *color_p) {
	if (disp_flush_enabled) {
		/*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/

		void lcd_transmit(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
				void *data);
		lcd_transmit(area->x1, area->y1, area->x2, area->y2, color_p);
	}

	/*IMPORTANT!!!
	 *Inform the graphics library that you are ready with the flushing*/
	lv_disp_flush_ready(disp_drv);
}

/*OPTIONAL: GPU INTERFACE*/

/*If your MCU has hardware accelerator (GPU) then you can use it to fill a memory with a color*/
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
//                    const lv_area_t * fill_area, lv_color_t color)
//{
//    /*It's an example code which should be done by your GPU*/
//    int32_t x, y;
//    dest_buf += dest_width * fill_area->y1; /*Go to the first line*/
//
//    for(y = fill_area->y1; y <= fill_area->y2; y++) {
//        for(x = fill_area->x1; x <= fill_area->x2; x++) {
//            dest_buf[x] = color;
//        }
//        dest_buf+=dest_width;    /*Go to the next line*/
//    }
//}

#else /*Enable this file at the top*/

/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif
